他们正在上课的时候,有人敲门 英语翻译
问题描述：
他们正在上课的时候,有人敲门 英语翻译
答
When they were having a class ,somebody knocked at the door
答
There was a knock on the door when they were in class.
答
Someone knocked at the door when they were in class
答
Someone knocked the door when he was in class.
答
Someone knocked on the door when they were having classes.
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